Tiffany spent ¹₈ of her salary on a refrigerator and ²₃ of the remainder on a lamp. If she saved the remaining $266, how much was her salary?
Fraction of the salary spent on the refrigerator = ¹₈

Fraction of the salary on the remainder
= 1 - ¹₈
= ⁷₈

Fraction of the remainder on savings
= 1 - ²₃
= ¹₃

Refrigerator	Remainder		Total
1x3	7x3		8x3
	Lamp	Savings
	2x7	1x7
3 u	14 u	7 u	24 u

The remainder and the total amount on the lamp and the savings are the same. Make the remainder and the total amount on the lamp and the savings the same.  LCM of 7 and 3 is 21.

Total salary = 24 u

Amount spent of the refrigerator = 3 u
Amount spent on the lamp = 14 u
Amount of savings = 7 u

7 u = 266

1 u = 266 ÷ 7 = 38

Tiffany's salary
= 24 u
= 24 x 38
= $912

Answer(s): $912